Impact of sulfur content on thermo-capillarity and melt pool dynamics in laser powder bed fusion of 316L powders

Simple item page
dc.contributor.authorLi, Zhiyong
dc.contributor.authorKan, Xinfeng
dc.contributor.authorYin, Yanjun
dc.date.accessioned2024-01-17T16:50:52Z
dc.date.available2024-01-17T16:50:52Z
dc.date.issued2023-12-05
dc.description.abstractAthree-dimensional numerical model is developed to investigate the influence of sulfur content on the transitions of thermo-capillarity and flow dynamics during laser powder bed fusion (LPBF) of 316L powders. The impacts of variations in sulfur contents on thermal behaviors involving heat transfer and solidification characteristics, thermo-capillarity transition, as well as the spatial and directional transitions in flow dynamics, are analyzed through mechanistic modeling techniques. It is observed that transient thermal behaviors, including melt pool profile, track morphology, and solidification processes, are significantly influenced by the contained sulfur concentration. High sulfur concentrations tend to result in finer microstructures and equiaxed grains. Through simulations, it is noted that the transition in the sign of temperature coefficient of surface tension (TCST) is more easily observable in low-sulfur level but disappears as the sulfur concentration is extremely low (0.0001%) With sulfur content increasing, a more homogenized velocity distribution is observed, accompanied with heightened flow complexity denoted by the emergence of additional branch flows and vortices. These findings offer valuable insights into the underlying physics of melt pool dynamics in the LPBF process and present a potential approach for process optimization.en_UK
dc.identifier.citationLi Z, Kan X, Yin Y. (2023) Impact of sulfur content on thermo-capillarity and melt pool dynamics in laser powder bed fusion of 316L powders. Materials Research Express, Volume 10, Issue 12, December 2023, Article number 126502en_UK
dc.identifier.eissn2053-1591
dc.identifier.urihttps://doi.org/10.1088/2053-1591/ad0dd0
dc.identifier.urihttps://dspace.lib.cranfield.ac.uk/handle/1826/20673
dc.language.isoenen_UK
dc.publisherIOP Publishingen_UK
dc.rightsAttribution 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/*
dc.subjectmelt pool dynamicsen_UK
dc.subjectthermo-capillaryen_UK
dc.subjectfluid dynamicsen_UK
dc.subjectlaser powder bed fusionen_UK
dc.subject316L powdersen_UK
dc.subjectsurface-active elementen_UK
dc.titleImpact of sulfur content on thermo-capillarity and melt pool dynamics in laser powder bed fusion of 316L powdersen_UK
dc.typeArticleen_UK
dcterms.dateAccepted2023-11-17

Files

Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
Impact_of_sulfur_content_on_thermo-capillarity-2023.pdf
Size:
2.69 MB
Format:
Adobe Portable Document Format
Description:
Download
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
1.63 KB
Format:
Item-specific license agreed upon to submission
Description:
Download

Collections

Staff publications (SATM)